ALEKS Assignment 9
Find the moles of each compound
Then divide those mole amounts by the total amount of moles, which is just the
two mole values added to each other
First you find mole fractions for each
Then use those moles to find the two pressures. Ot

STONY BROOK UNIVERSITY
Workshops for General Chemistry
Description: The chemistry workshops are intended to help you maximize your performance in introductory chemistry courses. During workshops you will work with a team of 2-3 other students on activitie

Review Questions for Exam 3, from Spring 2015
Multiple Choice
On the Scantron form, bubble in the letter of the one choice that best completes the statement or answers the
question. No credit will be given for multiple answers.
_
1. Which of the following

CHE133 VIRTUAL LAB 2 Fall 2014
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H ESSS LAW
Hesss Law states that Enthalpy change for a reaction is the same whether the reaction is carried out
directly or indirectly in several steps. Thus, the enthalpy changes for chemical reactions are additive, Just

Weight of cold water
Weight of Hot Water
Heat Capacity of water
44.8
52.5
4.184
The temperature of cold water
The temoerature of Hot water
The temoperature of the mixture
The heat lost by the hot water
The heat gained by the cold water
The heat absorbed b

CHAPTER 2 NOTES
2.1-2.6
Pure Substance- Either a compound or element it cannot be physically separated.
Element- Simplest kind of mater cannot be separated and has unique physical properties. The
Chemical properties of an element is determined by the elec

Thermochemistry:
Energy Flow and Chemical Change
Thermodynamics, study of energy and its transformations
Thermochemistry, branch of thermodynamics that deals with the heat in chemical and
physical change
Section 6.1: Forms of Energy and Their Interconvers

Review Questions for Exam 3, from Fall 2015
1. If the energy of a photon is 1.32 1018 J, what is its wavelength in nm?
A) 1.50 107 nm
B) 150. nm
C) 1.99 1015 nm
D) 1.99 1024 nm
E) none of the above
2. Platinum, which is widely used as a catalyst, has a wo

Exam 1, CHE 131 Fall 2015
25 Multiple Choice Questions, 4 points each
On the Scantron form, bubble in the letter of the one choice that best completes teh statement or
answers the question. No credit will be given for multiple answers.
1. The mass of a sa

Chapter 14: Chemical Equilibrium
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Reversible reactions stop before they are complete. The original reactants form product but then
the products react with themselves to give back the original reactants. Two reactions are
occurring and the

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If you add an acid or a base to water, the concentrations of H3O+ and OH- will no longer be
equal.
At 25oC, you observe the following conditions:
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pH: the negative of the base 10 logarithm of the molar hydronium-ion concentration
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The pH of a solution

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Reaction quotient Qc: an expression that has the same form as the equilibrium-constant
expression but whose concentration values are not necessarily those at equilibrium
If Qc > Kc, the reaction will go to the lef
If Qc < Kc, the reaction

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When an acid loses its protons readily, you can also say that its conjugate base does not hold the
proton very tightly.
The strongest acids have the weakest conjugate bases and the strongest bases have the weakest
conjugate acids.
The direction fo

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Changing the pressure by changing the volume of this system changes the partial pressures of all
gases, so the equilibrium composition is affected.
If the pressure is increased by decreasing the volume of a reaction mixture, the reaction shift

Chapter 15: Arrhenius Concept of Acids and Bases
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Arrhenius concept of an acid: An acid is a substance that, when dissolved in water, increases the
concentration of hydronium ion H3O+ (aq)
Chemists frequently use the notation H+ for the H3O+ ion an

4.1
Chem Chapter 4
Solute- What is dissolved
Solvent- The dissolver
Water- Is a polar molecule
Polar Bond- Uneven distribution of charge
Ionic Compounds in Water- Water seperates ions and becomes saturated
Electrolyte- Conducts a current when dissolved in

Chapter 3 Notes
3.1
1 mole = 6.022 x 10^23 (Avogadros Number (Na)
1 mol = number of atoms in 12 grams of carbon-12
1g = avogadros number x 1amu
Molar Mass (g/mol)- Mass in grams of 1 mol of the compound. It is the sum of all atoms in the
formula of a comp

ALEKS objective 6 2/26/2014
Solving Limiting reactant problems in solutions
There are an equal number of moles so you just need to compare them to find the LR
Find the moles of the first compound
Identifying Oxidizing reagents
The compound or element tha

CHE 131 Exam 1, Fall 2008
Multiple Choice, 4 points each On the Scantron form, bubble in the letter of the one choice that best completes the statement or answers the question. No credit will be given for multiple answers. _ 1. A ribbon has the following

Exam 1, CHE 131 Fall 2009
Multiple Choice, 4 points each
On the Scantron form, bubble in the letter of the one choice that best completes the statement or answers the question. No credit will be given for multiple answers.
_ 1. What is the correct name of